Flash Gun Unit

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Complete Uppers For The M-4 Carbine

Gas piston operation offers great advantages over direct impingment. The gun runs far cleaner, cooler and smoother for less cleaning, longer component life and faster follow-up shots. Adams Arms are renowned for their AR gas piston conversions. There are no less than three settings to enable conventional use, suppressed operation and manual reloading. The same system is also included on the Adams Arms piston upper. The Adams Arms complete piston upper is available in 16" carbine and 7 1/2 " pistol versions, the former with an M-4 handguard and the latter with a choice of quad rails.

PWS are unique in offering a long-stroke piston operating system for the AR. The Primary Weapon Systems piston upper is available with a 16" M4 profile, 1:7 twist chrome-lined barrel fitted with PWS own combined compensator and flash hider to get your sights back on target even faster. PWS claim that their non-adjustable system does away with unneccessary adjustment and has been redesigned resulting in reduced carrier tilt, cam pin wear and carrier bounce. Their proprietary rail system enables each rail to be removed separately by the armorer for replacement or access to the barrel. Tangodown SCAR rail covers are provided to cover unused parts of the rails.

Colt carbine upper is regarded by some as the only 'real' M-4 upper. Colt holds the patent on the M-4 name. Colt uppers have the feed ramp cuts and are machined from 7075 aluminum which is hardcoat anodized. The USGI M-4 upper is US Armed Forces in all respects appart from the 16" length of the step-cut, chrome-lined 1:7 twist barrel. The MarTech flip up backsight is US Army issue as is the double aluminum lined, heat resistant handguard. The Colt M-4 upper also comes in an Advanced Law Enforcement Carbine version which features a quad rail machined from the same billet as the receiver. This will not turn no matter how much torque you apply to the handguard. These are large pin uppers and the ALEC requires a proprietary barrel wrench to remove from the receiver.

YongNuo YN-465 Unboxing for Canon